[cli] add lower bounds check to channel selection (#3523)
[cli] add lower bounds check to channel selection (#3523)


srickardti/openthread,librasungirl/openthread,jwhui/openthread,bukepo/openthread,chshu/openthread,chshu/openthread,chshu/openthread,erja-gp/openthread,lanyuwen/openthread,erja-gp/openthread,jwhui/openthread,bukepo/openthread,openthread/openthread,librasungirl/openthread,abtink/openthread,turon/openthread,turon/openthread,turon/openthread,openthread/openthread,chshu/openthread,chshu/openthread,srickardti/openthread,lanyuwen/openthread,jwhui/openthread,srickardti/openthread,openthread/openthread,bukepo/openthread,lanyuwen/openthread,erja-gp/openthread,bukepo/openthread,turon/openthread,srickardti/openthread,lanyuwen/openthread,erja-gp/openthread,librasungirl/openthread,erja-gp/openthread,abtink/openthread,jwhui/openthread,lanyuwen/openthread,librasungirl/openthread,abtink/openthread,abtink/openthread,lanyuwen/openthread,erja-gp/openthread,chshu/openthread,openthread/openthread